CN103098537A - D2D communication procedures: beaconing - Google Patents

Abstract

There is a method and apparatus for transmitting a beacon for D2D communications in a first radio resource selected from among a first set of radio resources of a beacon frame; and for transmitting a broadcast message in a second radio resource selected from among a second set of radio resources of the same beacon frame. In various particular embodiments: the beacon has an indication that the broadcast message is to be transmitted in the beacon frame; the beacon has an indication specifying the second radio resource; there is transmitted a broadcast message header in the second radio resource during an initial subframe of the beacon frame and the broadcast message header has an indication of how many subframes are allocated for the broadcast message; and the broadcast message header has a retransmission control field that selectively indicates which broadcast partners are to re-transmit the broadcast message.

Description

D2D communication process: beacon; Broadcasting; Conflict solves

Technical field

The instruction of this paper relates generally to by being engaged in wireless device the equipment of the equipment D2D communication equipment for equipment beacon and broadcast is transmitted.

Background technology

What here definition was following writing a Chinese character in simplified form and term:

AP---access point

Beacon receiver---the equipment that receives during a DL cycle

Beacon conveyer---the equipment that transmits during a DL cycle

BCH---broadcast channel

BO---Radio Beacon meeting

BS---base station (for example, any universal network access node)

D2D---equipment is to equipment

DL---down link

Base station in eNB---LTE/LTE-A system

E-UTRAN---evolved UTRAN

LAE---local evolution (comprising that equipment is to the working title of the local wireless Access Network of devices communicating)

The Long Term Evolution of LTE---UTRAN (it also is known as 3.9G)

LTE-A---senior LTE

OFDMA---OFDM

PBCH---substantially broadcast or beacon channel

PRS---pseudo random sequence

PSS---main synchronizing sequence

RACH---RACH

RRM---provided for radio resources management

SRS---detection reference signal

SSS---less important synchronizing sequence

UE---subscriber's installation (for example move or subscriber station SS/MS, terminal)

UL---up link

UMTS---Universal Mobile Telecommunications System

UTRAN---UMTS grounding wireless access network

WiMAX---World Interoperability for Microwave Access, WiMax

WLAN---WLAN (wireless local area network)

Following wireless communication system trends towards integrated various network topologies, rather than order uses a plurality of networks of different agreement to overlap each other in identical geographical space.For instance, done some researchs about heterogeneous network, wherein be furnished with grand, little, slight and/or femtocell residential quarter and use via node in identical LTE/LTE-A honeycomb Overlay Topology, thereby all utilize identical radio-frequency spectrum.Another research field about this integrated idea is to allow subscriber equipment directly to communicate betwixt when close to each other.This respect usually is known as equipment equipment D2D is communicated by letter.At least the early stage idea of D2D communication is used by honeycomb fashion or the concrete licensed-in radio-frequency spectrum of distributing of other hierarchical networks.A kind of possible implementation for D2D is in " ownership " cellular cell.As several limiting examples, be respectively in WiMAX, HiperLAN2 and Tetra agreement for the proposal of D2D.Use for frequency spectrum, also feasible way is that described heterogeneous network or described D2D communication all do not utilize identical radio-frequency spectrum in addition, but in the situation that regulations and license issuance allow, divide all available radio-frequency spectrums according to sharing between efficient and reasonable manner communication requirement in every respect to reach.In this local use for radio-frequency spectrum, novel cognitive radio technology plays an important role.

Need to set up the D2D operation that is used for carrying out between each equipment in coverage exchanges data.The method of prior art usually depends on and can actual at first each D2D equipment authenticated each other before D2D exchanged between equipment broadcast.This just causes the larger time delay from initial condition, is ready to send message this moment when another equipment having been carried out authentication and having had betwixt communication linkage to can be used for transmitting user data.

Current, the D2D Radio Beacon can be described to only be used for exchange D2D and self-organizing network beacon message, and initiates to shake hands for the unicast messages exchange that is used for discovery, authentication and association messages.Need broadcast service to enable new option for user and Virtual network operator, comprising the location-based marketing, the local search that creates Local Community, local discussion and microblogging, immanent game and even utilize " local semantic net ".

The a list of references relevant with the instruction of this paper is Danish Patent Application 2008E02868DK, and wherein BS is divided into each group and continues to send identical message, until every other BS may receive described message.This method designs for the situation that each BS wherein has the information that will send and each BS should receive the information of each BS.

In addition, WO09/018212 is also relevant with the instruction of this paper, and wherein Flood routing is found grouping in network.The broadcasting partner confirms received broadcast, and guarantees that at least one other equipment has received described message.According to United States Patent (USP) 7,639,709 instructions, equipment can keep the use for time slot in the bootstrapping cycle.

Summary of the invention

In first aspect, exemplary embodiment of the present invention provides a kind of method, and it comprises: in beacon frame, transmit the first radio resource of selecting in the middle of the first set of radio resources of beacon frame for the beacon of equipment to devices communicating; And in beacon frame, transmit broadcast in the middle of the second set of radio resources of beacon frame the second radio resource of selecting.

In second aspect, exemplary embodiment of the present invention provides a kind of computer-readable recording medium or memory of storing the computer-readable instruction program, when being carried out by at least one processor, described instruction causes following action: transmit the first radio resource of selecting in the middle of the first set of radio resources of beacon frame for the beacon of equipment to devices communicating; And transmit broadcast in the middle of the second set of radio resources of described beacon frame the second radio resource of selecting.

In the third aspect, exemplary embodiment of the present invention provides a kind of device, and it comprises at least one memory of at least one processor and storage computer-readable instruction program.In this third aspect, described at least one memory with instruction repertorie is configured to utilize described at least one processor to make described device implement at least following steps: transmit the first radio resource of selecting in the middle of the first set of radio resources of beacon frame for the beacon of equipment to devices communicating; And transmit broadcast in the middle of the second set of radio resources of described beacon frame the second radio resource of selecting.

In fourth aspect, exemplary embodiment of the present invention provides a kind of device, and it comprises: be used for transmitting for the parts of equipment to the beacon of devices communicating at the first radio resource of selecting in the middle of the first set of radio resources of beacon frame; And the parts that are used for transmitting at the second radio resource of selecting broadcast in the middle of the second set of radio resources of described beacon frame.In a specific embodiment, these parts comprise at least one transmitter combined with at least one processor.

At length introduce below these and other how specific aspect.

Description of drawings

When read in conjunction with the accompanying drawings, aforementioned and other aspects of the instruction of this paper will become apparent in the following detailed description.

Fig. 1 shows according to the D2D beacon frame structure during the Radio Beacon meeting of one exemplary embodiment of the present invention, and the resource that wherein is not used to the equipment beacon is used to D2D device broadcasts message and transmits.

But Fig. 2 is similar to the beacon frame of Fig. 1 the re-transmission that has specifically illustrated that the broadcast of being undertaken by a UE according to one exemplary embodiment of the present invention transmits and undertaken by the 2nd UE as the broadcasting partner of a UE.

Fig. 3 A shows for an exemplary bit that transmits at the equipment beacon, and it is used for showing whether equipment also has the broadcast that will send in identical OFDMA symbol and identical beacon frame.

Fig. 3 B shows according to each bit field in the header of one of one exemplary embodiment of the present invention independent broadcast and the implication that is associated.

Fig. 3 C shows the implication according to the bit value in the different bit positions of " Retransmission control bit " field of Fig. 3 B of one exemplary embodiment of the present invention.

Fig. 4 is equipment and broadcasting partner's thereof block diagram, wherein shows by each bit in the Retransmission control bit field of optionally setting the header shown in Fig. 2 and comes flooded broadcast message intelligently.

Fig. 5 is the signaling diagram that is used for setting up the broadcasting partner according to one exemplary embodiment of the present invention.

Fig. 6 is similar to Fig. 2, does not wish to initiate the situation of broadcast but show according to the more details of one exemplary embodiment of the present invention and corresponding to partner appliance wherein at it in the frame of central transmission beacon.

Fig. 7 is the timeline that shows the exemplary beacon chance that transmits for broadcast according to one exemplary embodiment of the present invention.

Fig. 8 be according to one exemplary embodiment of the present invention show that the broadcasting partner sets up message and based on the signaling diagram of the broadcast status indication of the quality of received broadcast.

Fig. 9 A be according to one exemplary embodiment of the present invention in order to specify the form of setting up each information element of the standard in signaling for the broadcasting partner of broadcast mass measurement.

Fig. 9 B is the form according to each information element of the broadcast status indication message of Fig. 8 of one exemplary embodiment of the present invention, wherein comprises the statistics that broadcast transmits.

Figure 10 is for the estimating power density (vertical axis) of LAE and WLAN radio transmitting broadcast and the minimum radio curve chart that turn-on time, (trunnion axis) compared.

Figure 11 is similar to Fig. 6, is chosen on identical resource broadcast conflict when transmitting its broadcast but show when two broadcasting partner appliances.

Figure 12 is similar to Fig. 6, avoids the solution of conflict Figure 11 shown according to one exemplary embodiment of the present invention by the beacon transfer equipment but show.

Figure 13 is the form according to each information element of the conflict notification message that is sent to the equipment with broadcast conflict by receiving equipment of one exemplary embodiment of the present invention.

Figure 14 is according to the signaling diagram in the collision detection environment of one exemplary embodiment of the present invention, and the broadcast resource that the beacon transfer equipment UE1 that wherein has lower priority selects not to be used retransmits its header and transmits its broadcast.

Figure 15 shows the concept map based on the priority facility of device id and timestamp according to one exemplary embodiment of the present invention.

Figure 16 is similar to Fig. 6, avoids the solution of conflict Figure 11 shown according to one exemplary embodiment of the present invention by the beacon receiving equipment but show.

Figure 17 shows the process chart for the process of being avoided the broadcast conflict by the beacon receiving equipment.

Figure 18 is the curve chart that is similar to Figure 10, but shows for the LAE radio of the exemplary embodiment of the instruction that utilizes this paper and WLAN is wireless sends successful estimation.

Figure 19 shows the simplified block diagram of the various electronic equipments that are applicable to put into practice exemplary embodiment of the present invention.

Figure 20 shows the action of taking according to the operation of the method for exemplary embodiment of the present invention, by D2D equipment or device and the logical flow chart that is embodied in the execution result of the computer program instructions on computer-readable memory.

Embodiment

A kind of concrete and nonrestrictive environment that can put into practice therein embodiments of the invention is a kind of like this system, the message that wherein floods in the middle of all participants by multi-hop, thus create the always available message distribution channel be improved.As an example, the impromptu community of Nokia (Instant Community) permission equipment is shared content with contiguous equipment.Impromptu community can arrange by the D2D network that has wherein for the radio frame (for example every 100ms) of D2D beacon retention periods repetition.Fig. 7 shows an example of such beacon frame.If there is AP, for this radio frame for each D2D beacon (it is respectively Radio Beacon meeting) reservation provide from the side-play amount of the much frequent periodicity AP beacon (for example 10ms) that occurs.Do not specifically illustrate the periodic beacon of AP in Fig. 7.Although this Radio Beacon can be to keep in the time, it is (for example in the 50MHz fragment of overall 200MHz frequency band) that frequency domain is concentrated that each time beacon is transmitted in this radio frame that keeps.This D2D beacon spectral slice is divided into each beacon channel, for example is respectively 25 channels of 2MHz.Another kind of practical exemplary parameter is the 20MHz fragment with 16 beacon channels, and wherein the size of each channel is 6*180KHz.The D2D equipment of each participation transmits the beacon of himself in a channel of described fragment, and can obtain by the remainder of intercepting described fragment when himself not transmitting the knowledge about the D2D equipment of other participations, thereby save battery electric power by avoiding needing to coordinate irregular wake-up period.Any independent D2D equipment can transmit, receive or doze off between the specified beacon window/sleep, but due to the D2D beacon at any independent equipment transmit between defined maximum time (for example 1600ms) and can not doze off indefinitely.The content of such D2D beacon can be for example main synchronizing sequence PSS, is thereafter less important synchronizing sequence SSS, is thereafter main beacon channel PBCH.The part of PSS and SSS constituting layer 1 device identification ID, it is used to separate with reference to symbol and the content of PBCH between neighbouring device.Certainly, in other exemplary environments, described channel can adopt time-division or code to divide rather than frequency division.

The below will describe the handshake authentication between D2D equipment.Equipment transmitted the D2D beacon of himself in the DL subframe after, it made immediately and himself is used in the random access request that receives other equipment on this UL subframe, and it is represented as the RACH (RACH) of beacon transfer equipment.Do not wish that the equipment of further communicating by letter with described equipment will show this point in the RACH of beacon transfer equipment, this is for example to show that it is not useable for the RACH request and realizes in transmitting or transmit by the beacon at himself by the beacon that suppresses himself.The DL beacon of combination and UL RACH for example continue 1.5-3.0ms, and actual handshake procedure occurs after the duration at the beacon that makes up/RACH.For instance, handshake procedure comprise service discovery request and response (if related D2D equipment also and is not each other implemented), authentication and related exchange (if the also execution each other of same related D2D equipment) and if, have data to exchange about the indication that whether has any data to exchange to also have exchanges data.Handshake procedure can also comprise and will be used to the negotiation of the resource of communication afterwards, perhaps comprise simply session setup.May need to authenticate and related correct recipient or source of guaranteeing data, and consult to be used for the suitable resource of exchanges data.

Fig. 1 shows the D2D beacon frame structure according to one exemplary embodiment of the present invention.The shadow region shows the radio resource that can be used for from the D2D broadcast.Unshadowed area is reserved beacon 102, RACH104 and the handshake procedure 106 of describing in detail about exemplary Nokia impromptu community environment to be used for the front.The full content of Fig. 1 is constrained to a Radio Beacon meeting, and it is for example to continue 7.5ms(altogether this is the length of periodic beacon chance in Fig. 1) eight DL/UL time cycle/subframes.Such frame structure can allow 250 D2D equipment to add the beacon group that has for example kept the 50MHz frequency band, and the maximum time between the beacon of wherein supposing equipment transmits is ten Radio Beacon meetings.

Consider an example.If only have the D2D equipment of half participation to transmit its beacon in the meeting of given Radio Beacon and second half is only intercepted, 25 beacon channels can allow 50 equipment altogether.Thereby make each equipment only transmit once for described largest interval by this is expanded, can allow the many higher multiple of described 25 beacon channels, this depends on how long the beacon of equipment this largest interval between transmitting has.By lengthening described largest interval and/or can using more than 25 beacon channels for each Radio Beacon, can allow even more than 250 participation devices.Be expected at D2D equipment number in the typical self-organizing of extensive employing/D2D network far less than 250, even so the instruction of this paper be also gratifying for extreme D2D networking implementation.

For example the service of idea of Nokia impromptu community and so on can be used the OFDMA principle.Use for D2D, this means that beacon itself uses framing to transmit just as previously described in detail in time domain, and also have multiple user signals multiplexing between each OFDMA subchannel in frequency domain.So with reference to Fig. 1, D2D equipment transmits its broadcast in the identical OFDMA symbol of the beacon that is used to this equipment and handshake procedure, and as seen in Figure 1, these broadcasts are followed the UL/DL frame structure identical with beacon frame.In other words, Radio Beacon can 100 interior existence be used for setting up and the first set of radio resources 110(of keeping D2D or self-organizing network and being used for management and exchanges data (Fig. 1 shakes hands 106) at the radio resource of Fig. 1 for beacon 102 and RACH104); And existence is as the broadcast 108 in second set of radio resources 120(Fig. 1 of the surplus resources of described Radio Beacon meeting), it is for the D2D equipment all devices transmission broadcast in the local coverage minimum time (described Radio Beacon meeting) in, and wherein the first and second set of radio resources are used the OFDMA resource that walks abreast in frequency domain.In other implementations, described simultaneous resource can be in time domain or code domain.Therefore one of the OFDMA resource in channel flexibly part be dedicated to the equipment beacon and transmit, and remaining resource part is dedicated to send the broadcast of initiating by participating in equipment that described beacon transmits.The first and second set of radio resources are not necessarily fixing aspect number or aspect the concrete resource in a given set, on the contrary in one embodiment, each set of radio resources is flexibly, in order to be adapted to use the different numbers of the equipment of D2D communication.

So just allow the operation based on the one-to-many D2D broadcasting of OFDMA beacon scheme.A kind of technique effect of this general idea is, D2D equipment can receive beacon and broadcast in identical frame, thereby and can not increase and also have turn-on time corresponding to the receiver of equipment power consumption owing to receiving broadcast reviving for the second time sometime afterwards.There are some additional energy consumption relevant with the reply broadcast, but energy consumption that should be additional is less, this is the additional medium time of intercept of broadcasting in order to reception because of not, and any internal electrical components of equipment can not revived from sleep pattern separately.Suppose the turbo decoding, estimate 2015, the simulated assembly of receiver will consume at reception period 90% energy, be approximately 50% today, the marginal profit that this means the instruction of this paper that relates to the electric power saving will be more remarkable in future, thereby this is because avoided the circulation of simulated assembly by being avoided reviving from sleep pattern, so the electric power of simulated assembly consumes to become and more occupies leading position.

Thereby transmit broadcast and can be used for the interior all devices of coverage.Broadcast can comprise multiple different content.As limiting examples, the availability of can the advertisement local application of broadcast, service or equipment (machine); It can be used to the Generic advertising in shop or restaurant, and it can set up the multi-hop routing table, is perhaps for everyone the friendly message near equipment simply.Can by the multi-hop flooded broadcast message of node, perhaps can only transmit broadcast by single-hop.

As seeing in Fig. 1, radio resource during beacon frame 100 is divided into the transmission cycle 130a that each D2D equipment can transmit therein or receive, the sequence of 130b, that is to say that the described cycle is certain continuous collection that is made of five to eight DL/UL cycle 130a, 130b.The purpose of this resource division is the signaling possibility of distributing in order to authentication, association and the exchanges data resource initiated for (self-organizing) network in the first interior realization of set of radio resources 110, is more generally perhaps all steps necessarys of initiating or carry out in order to realizing that between D2D equipment data transmit.Identical DL/ UL sequence 130a, 130b in the second set of radio resources 120 can be used for exchanging the D2D broadcast.Figure 6 illustrates a limiting examples of this operation.In this manner, utilizing D2D that the first set of radio resources 110 of beacon frame 100 is carried out to shake hands to use the second set of radio resources 120 that is used for utilizing beacon frame 100 to broadcast the identical OFDMA symbol (concurrently) that transmits and receive completes.

Can retransmit the broadcast in identical beacon frame, in order to broadcast is forwarded to other beacon conveyers.The operation that Radio Beacon can be able to be regarded as simplifying, first group of D2D equipment (half D2D equipment for example wherein, it is for for simplicity being known as " even number " D2D equipment) transmit its beacon, and second group of D2D equipment (for example second half D2D equipment, it is for for simplicity being known as " odd number " D2D equipment) receives the beacon of first group.For in the active device (being other conveyers in relating to this example of beacon conveyer) that arrives second group during a Radio Beacon meeting, should repeat described message, for example shown in Fig. 2 like that.Consider two equipment, i.e. the first equipment UE in first group ₁With second group in the 3rd equipment UE ₃(not specifically illustrating), thus only have the first equipment to transmit its beacon in Fig. 2.So the 3rd equipment can be regarded as the broadcasting partner of the first equipment.Its beacon 202 of the first device broadcasts, and it can receive the RACH request 204 from the 3rd equipment.The first equipment sends the first broadcast MSG subsequently as shown in Figure 2 ₁206, its broadcasting partner UE3 is in the first equipment UE ₁In wherein sending MSG ₁The identical sequence 230b of original broadcast 206 in the 206-r place again broadcast this message.The pattern identical according to this can also retransmit additional broadcast, as for the next broadcast MSG in the identical beacon frame of Fig. 2 ₂Original broadcast 208 and to retransmit 208-r shown like that.In general, broadcasting partner repeated broadcast message during the UL cycle of D2D beacon frame.Therefore, in single beacon frame, by UE ₁The broadcast that sends is by for example UE ₂And so on other beacon conveyers and for example broadcasted partner UE ₃And so on the beacon receiver receive.As shown in Figure 2, send broadcast header 203 during transmitting therein DL cycle of 202 beacons itself, and message content part (MSG ₁, MSG ₂Etc.) by beacon equipment UE ₁Send 206,208 in the DL of back part.During the UL of described D2D beacon frame part, header 205 and message part (MSG ₁, MSG ₂Etc.) be broadcasted partner UE ₃Repeat immediately 206-r, 208-r.So-called " immediately " means in next subframe; May there be the protection cycle to be used for conveyer can be separated with receiver, so that permission equipment retunes its radio.

To use the identical OFDMA symbol in identical beacon frame 100 in exemplary embodiment of the present invention with broadcast 108 due to handshake information 106, therefore according to a specific embodiment, transfer equipment comprises broadcasting indication (for example broadcast has sent bit) at its beacon that transmits 102.Fig. 3 A shows exemplary embodiment and the implication thereof of such broadcasting indication bit: if be set to 1, this bit shows have broadcast 108 in beacon frame 100, if be set to 0, this bit shows do not have broadcast 108 in beacon frame 100.In general, have such bit in the beacon of equipment, it shows in identical OFDMA symbol whether have broadcast.A kind of technique effect of this embodiment is, whether receiving equipment can always exist broadcast from it the equipment beacon of paying close attention to is informed in this frame, thereby receiving equipment does not need to intercept additional message, and need to be in order to the blind detection of finding that broadcast transmits.

In a specific embodiment as shown in Fig. 3 A, if showing, described indication bit has broadcast 108 in beacon frame 100, also exist a plurality of bits (in Fig. 3 A being 5) to be used for showing the resource that sends (a plurality of) broadcast thereon.In the exemplary embodiment of a replacement, the main and less important synchronizing sequence (its definition physical equipment ID) that is used for the beacon transmission also is added to broadcast.Even any in the middle of these two embodiment can be used to the conveyer of identification broadcast when a plurality of broadcast conflict is arranged.

Fig. 3 B shows an exemplary embodiment of each bit field in the broadcast header that for example transmits in a DL subframe 204 as shown in Figure 2.This header also by the beacon partner continue after the UL subframe in repeat/retransmit (MSG of Fig. 2 ₁The re-transmission of 206-r).

Have a field " being the subframe of broadcast allocation " 302, it is indicated as the quantity that broadcast transmits the subframe (DL cycle) of distributing.In the example of Fig. 3 B, can there be one to eight DL subframe to be preserved for broadcast according to this field 302 after beacon transmits and transmits.[note: in the specific implementation of Fig. 3 B, numerical value 0 is retained].Have the field corresponding to " re-transmission " 304, its length only has a bit.If this retransmission bits is set to 0, show that source device transmits broadcast just for the first time; In all other circumstances, retransmission bits is set to numerical value 1.

Also show an additional information element IE or field 306 in Fig. 3 B, it provides about when send the indication of broadcast next time.The length of this field 306 in Fig. 3 B is 8 bits, and the assignment information corresponding to the beacon slot that uses in the future is provided, and it has also reduced the possibility that a plurality of conveyers transmit in identical beacon slot occurs in addition.Fig. 3 C is an instantiation corresponding to the bit value of this " Retransmission control bit " field 306.In one exemplary embodiment, this Retransmission control bit field 306 is present in the broadcast frame of all transmission, and controls the re-transmission of broadcast.

About Fig. 3 C describe in detail eight exemplary bits corresponding to Retransmission control bit field 306 (it is indexed as 0,1 ... 7) all numerical value.

Bit 0 is set to 1 all should retransmit this frame with all recipients that show broadcast.This option is set at the source device place of group addresing frame usually.

Bit 0 is set to 0 and only has the broadcasting partner should retransmit the group addresing frame to show.The source of broadcast is set to 1 to bit 0 usually, and enables widely disseminating for broadcast.The message that retransmits is set to 0. to bit 0 usually

Bit 1 to 7 shows the broadcasting partner's who assigns operation.The bit that is assigned to a certain partner is set to 1 and shows that the broadcasting partner should retransmit this frame.This bit is set to 0 and does not show and should retransmit broadcast frame.

For example also show an additional column corresponding to bit 8 and 9 in Fig. 3 C.How many this parts of Retransmission control bit field 306 also has jump in re-transmission to be identified as those broadcasting partner notification that retransmit device in bit 0 to 7.In the message of the re-transmission that these broadcasting partner sends, it reduces 1 with the numerical value of this field respectively.In this manner, this field counts down along with propagating in the middle of multi-hop to zero degree and further retransmits.In a kind of implementation of replacement, can have one or two (or more) bit be used for showing with Fig. 3 C in each retransmit jumping figure specific to the residue that broadcasting partner's bit 0 to 7 is associated, it optionally will retransmit extension different length (number of retransmissions) in different directions.

Message and statement transmission that the originator of broadcast (for example transmitting the equipment of its beacon in beacon frame 100) assigns some broadcasting partners to repeat to transmit are successfully.The originator of broadcast can come resend messages to reduce the quantity of re-transmission by only setting a few broadcasting partner rather than all neighbouring devices.

The originator of broadcast can lead the direction of the message that forwards by assigning some broadcasting partner forwarding messages.Thereby can only message be flooded to desired direction.Reduce network overhead for the described control of broadcasting the quantity that retransmits, and reduced stand-by electric consumption.In order to make this point clearer, Fig. 4 shows an equipment and broadcasting partner's thereof block diagram, and the intelligence that wherein shows by realizing the broadcast that Retransmission control bit field 306 allows floods.

Use the Retransmission control bit field 306 shown in Fig. 3 C as an example for Fig. 4, make following hypothesis: equipment 1 is the originator of broadcast; Its broadcasting partner is equipment 2-5, and it is associated with Retransmission control bit 2-5 respectively; And not making index of reference in this frame is 1 and the Retransmission control bit of 6-7.The Retransmission control bit that is had following setting by the header 205 of equipment 1 transmission:

Bit 0 is set to 0 value, this means to only have the broadcasting partner to retransmit;

Bit 2-3 is individually set to 1 value, and the equipment 2-3 of this means retransmits respectively;

Bit 4-5 is individually set to 0 value, and the equipment 4-5 of this means does not retransmit.

In the situation that the relative physical location of each equipment shown in Given Graph 4, final result is the selectivity direction that forwards 400 broadcasts, and this is that other broadcasting the partner do not retransmit because only retransmit along the broadcasting partner of this general direction.

The below describes about how to set up broadcasting partner's a exemplary embodiment by signaling with reference to Fig. 5.As previously mentioned, the broadcasting partner is used to the broadcast of beacon conveyer (namely broadcasting therein the broadcast 108,206 that starts in the identical beacon frame 100 of self beacon 102,208 equipment) is retransmitted/be forwarded to the beacon receiver.In one exemplary embodiment of the present invention, each transmits the equipment of broadcasting and one to seven equipment of another broadcasting group is set up broadcasting partner process.Can set up more than seven equipment for partnership in other embodiments, this depends on the bit number that distributes for the Retransmission control bit field 306 in Fig. 3 B-C.The broadcasting of in one exemplary embodiment, having set up the equipment of broadcasting partnership will monitor each other transmits; It will keep the statistics of the broadcast that transmits, and can retransmit received broadcast according to control signal.

Hypothesis UE0 is the equipment of its beacon of broadcasting and the broadcast that starts in beacon frame in Fig. 5, and UE3 is the equipment that the UE0 selection is established as its one of them broadcasting partner.UE0 is by intercepting and the beacon 502 of receiving equipment UE1, UE3 and UE5 knows that these equipment are near it.In square frame 504, UE0 selects UE3 with one of them the broadcasting partner as it from odd number group equipment.For the example of this Fig. 5, only consider two UE groups for beacon: odd and even number, this respect is distinguished by the beacon frame 100 that described UE transmits beacon therein.UE0 is even number set equipment, and the odd number group equipment beacon frame of broadcast beacon therein is different from the beacon frame that UE0 broadcasts self beacon therein, so the UE0 frame that receives therein its beacon 502 by UE0 knows UE1, UE3 and UE5 is in odd number group.As the front mention when how to explain that instruction with this paper expands to 250 or more equipment, can have more than two beacon group only.Figure 7 illustrates the Radio Beacon meeting corresponding to even number and odd number beacon group, the additional Radio Beacon meeting that can define therein additional beacon group is arranged between described two groups.

Selected UE3 in square frame 504 after, UE0 transmits broadcasting partnership request message 506 with backward UE3.In one exemplary embodiment, this message 506 comprises following information element (it also is known as the beacon parameter corresponding to this message 506):

Type of message: this parameter shows for the request of setting up the broadcasting partnership between equipment.

Session tokens: this parameter given transaction, and be used to guarantee correctly tackled for the re-transmission of request 506 and possible new request.

Send the physical equipment ID of the equipment of request: this parameter is the ID of the UE0 that obtains by the physics PHY parameter that has sent message 506 according to it.

Be used to the resource that the beacon of the equipment/UE0 of the request of sending transmits.

The broadcasting that equipment/UE0 uses by the request of sending transmits the interval: this parameter shows the basic cycle property that transmits corresponding to broadcast.

In response to receiving broadcasting partnership request message 506, UE3 makes response by send broadcasting partner response message 508 to UE0.This message 508 comprises following information element:

Type of message: this information element shows for the response of setting up the broadcasting partnership between equipment.

Session tokens: this information element is set to specified identical numerical value in broadcasting partnership request message 506, so that the given transaction well afoot, and is used to guarantee correctly tackled for the re-transmission of request 506 and possible new request.

Success: this information element shows the success of request 506, and this field for example has following implication: numerical value 0=success; Numerical value 1=failure ﹠amp; Be operating in wrong broadcasting group numerical value 2=failure ﹠amp; The equipment of monitoring is too much, numerical value 3=other failures (for example unspecified failure) except numerical value 1 and 2.

Physical equipment ID: this information element is the ID that makes the equipment UE 3 of response.

Be used to broadcast the resource that the beacon of partner UE3 transmits.

The broadcasting of being accepted by broadcasting partner UE3 transmits the interval: should be mentioned that in one embodiment, the frequency at the interval that this is accepted can lower than the interval of request 506, be saved option in order to allow for the further electric power of UE3.

UE0 for example can be based on signal strength signal intensity or the duration (namely selecting near UE0 and to its static equipment) of mutual neighbouring relations for the selection of broadcasting partner appliance UE3 in square frame 504.UE0 it is also conceivable that its any other broadcasting partner's position when selecting partner additional or that substitute.The directivity of described positional information help UE0 setting flooded broadcast or minimizing are for the retransmission number of the frame of broadcasting, as briefly shown in Figure 4.

Fig. 6 is an exemplary broadcast frame 600, and wherein a D2D equipment transmits its beacon 602, but wherein beacon 602 show will be by the beacon transfer equipment with the broadcast that sends.In this case, in one exemplary embodiment of the present invention, originally may be can be used for by the resource that a D2D equipment is used for broadcast the broadcast that is started by one or more partner appliances.There are two partner appliances to send respectively three broadcasts (perhaps sending a broadcast with three parts) in the example of Fig. 6 in beacon frame 600, wherein a D2D equipment transmits its beacon, and described beacon shows that it does not have broadcast will send (for concrete broadcast IE referring to Fig. 3 A) in this frame 600.

Should be mentioned that in honeycomb fashion and other hierarchical type communication systems, term UL and DL mean that respectively UE arrives UE to base station and base station; Term UL and DL are so not strict in the self-organizing and the implication in the D2D network that are not stagewise, therefore to have in this manual what understand for self-organizing and D2D network be not so strict implication for term DL and UL, and be used to simply the contiguous time cycle in a frame is distinguished from each other.Do not have broadcast will send (it is sent out at first according to Fig. 2) in the DL subframe because beacon transmits a D2D equipment, therefore in Fig. 6, the original transmission of broadcast all is sent out in the UL subframe, and this is to be sent by partner appliance because of it.

The one D2D equipment transmits its beacon 602 in a DL subframe 650 of beacon frame/chance 600, and this beacon 602 shows the broadcast that does not have from a D2D equipment.Two exemplary partner appliances transmit respectively conduct for the D2D triggering 603a of the response of received beacon frame in a UL subframe 651.Described D2D triggers and can be used to show that this equipment wishes to initiate to set up the signaling of D2D/ self-organizing network.The one D2D equipment triggers to make to D2D and replys by being transmitted in the 2nd DL subframe 652 the shaking hands of beginning/authentication message 603b, described handshake procedure is further continuing in subframe, shake hands/authentication message 611a thereby make each partner appliance transmit in UL subframe 653,655 and 657, and make a D2D equipment transmit it in the DL of back subframe 654,656 and 658 to shake hands accordingly and reply 611b.Perhaps, for fear of the potential broadcast resource of monitoring corresponding to broadcasting partner's broadcast, the D2D triggering can be used to show to this broadcasting partner and transmit broadcast.

Do not have broadcast to transmit a D2D equipment from beacon owing to showing in the beacon 602 of a DL subframe 650, thus each partner appliance broadcast of transmitting himself in a UL subframe 651 indicate 604a, 604b(its for example shown in Fig. 3 A).This message 604a, 604b for example show with by partner appliance so as to send the radio resource 640,642 of original broadcast message in this broadcast frame 600.

Partner appliance transmits broadcasting header 621a, 621b(for example referring to Fig. 3 B in the 2nd UL subframe 653) and the 631a of first, the 631b of the first broadcast MSG1_1 and MSG2_1.In this embodiment, be used to RACH in Fig. 2 and only be used to show that with (UL) cycle 651 of shaking hands 604a, 604b partner appliance will send the intention of broadcast, this is because related equipment has been set up partnership and do not needed the RACH exchange.By the broadcasting header 621a of partner appliance transmission, the broadcast segment that transmits that 621b introduces frame 600, and specify the UL cycle (1-7) of what back in this BO600 to be used for its (repeatedly) broadcast transmission by partner appliance.In the example of Fig. 6, broadcasting header 621a, 621b will show that partner appliance will transmit the broadcast of himself in three UL cycles (653,655,657).

Beacon transmits the/the one D2D equipment and is retransmitting immediately following in the DL subframe 654 the 2nd UL subframe 653 after, and its partner appliance receives three re-transmissions of the 631a-r of first, the 631b-r of the broadcasting header 621a-r, the 621b-r that are sent by described partner appliance and the first broadcast MSG1_1 and MSG2_1.Other two couples of broadcast MSG1_2 and MSG2_2 and MSG1_3 and MSG2_3 follow similar transmission and retransmission processes, but header 621a, 621b are neither transmitted again by partner appliance, are not also transmitted a D2D equipment by beacon and again retransmit.

Fig. 6 is equally applicable to neither to send himself in frame 600 beacon 602 does not transmit other partner appliances of original broadcast message yet; It is implemented simply for beacon and transmits the/the one shown re-transmission of D2D equipment and also have handshake procedure.In general, each D2D equipment that transmits broadcast should have at least one (a plurality of) DL in the back and repeats all or part of the broadcasting partner appliance by the broadcast of the D2D equipment transmission of starting in the cycle at (a plurality of) UL in the cycle.This operation is guaranteed can receive the broadcast from other partners in the partner appliance (i.e. the partner appliance of receiving equipment beacon 602 in identical beacon frame 600) that transmits original broadcast message during the UL cycle in Fig. 6.The DL cycle 654 that equipment retransmits therein makes these equipment repeated broadcast header 621a-r and 621b-r.

Transmit in the broadcast of UL Energy Resources Service the possibility of initiating and provide better efficient for the beacon frame utilization of resources.Should be mentioned that beacon transmits the/the one D2D equipment and receives D2D as potential broadcasting partner trigger 603a during the first up link cycle 651, beacon receiver/broadcasting partner showed in 604a, 604b and had the broadcast transmission this moment.Therefore, beacon transmits D2D equipment need not be in its beacon subframe 650 and comprise in subframe after the subframe 651 that D2D triggers just to receiving broadcasting indication 604a, 604b from target device and reviving, therefore consumption additional-energy seldom only.

Fig. 7 is the timeline of super frame 700, wherein shows the exemplary beacon chance that transmits for broadcast.In this embodiment, D2D equipment must be minimum is (for example the broadcasting the beacon of himself) of enlivening in every the 16th Radio Beacon meeting, receives and transmits to be used for broadcast.Use the odd/even D2D device packets of front, the even number set Radio Beacon can 702 and can 704 the be separated by Radio Beacon meeting at eight regular intervals of odd number group Radio Beacon, and vice versa.Suppose that even number and odd number D2D equipment are broadcasting partners each other, even number set transmits its beacon according to Fig. 2 and even number set is made response according to Fig. 2 in BO702, if perhaps even number D2D equipment does not have broadcast in BO702, the odd number partner appliance can be made response as in Figure 6 in BO702.In the ideal case, each the even number D2D equipment that sends its beacon in BO702,704 sends on the channel different from other even numbers D2D equipment, just as previously mentioned.If in very crowded environment or not for BO divides the enough frequencies that are used in required D2D communication, may have some Channel Sharing.Certainly, can have from more than the equipment of two groups partner each other each other, this means and replace independent D2D equipment for having the BO ratio of 1:1 as beacon transfer equipment and partner appliance, compare as the situation of beacon transfer equipment (beacon transmission) with this equipment, this equipment will have more BO in its given super frame 700 as partner appliance (beacon reception) therein.

In one exemplary embodiment, BO is dedicated to D2D communication.The particular B O that a certain independent equipment must transmit its beacon therein in an example embodiment can be depending on the device id of this specific installation, thereby need not come to assign equipment for BO with control signal.For instance, the device id that belongs to the equipment of even number set equals even number, and the device id that belongs to the equipment of odd number group equals odd number.In one embodiment, store an algorithm in the local storage of each D2D equipment, it is divided into two (or more) groups with equipment on random and statistics equably.Two sizes similarly group provide good performance for retransmitting message and have guaranteed the distribution of message, as illustrate generally in Figure 10, the figure shows an example of the minimum activity that the broadcasting corresponding to even number and odd number group transmits.

Thereby to be the broadcast of equipment long can't be contained in the boundary of a BO for the situation that may occur.In this case, according to one embodiment of present invention, the header 203,621a, the 621b that transmit corresponding to broadcast comprise " continuation " bit, and it shows that transfer equipment will continue its broadcasting and transmit among one in the middle of the BO of two of ensuing back.The D2D equipment that receives these broadcasts should be in response to see that this bit is set and receives during the BO of back.If receiving equipment detects the energy that may transmit from broadcasting and movable but decode messages or continue bit correctly, such receiving equipment receives during being recommended in two of ensuing back BO, in order to guarantee can not miss the broadcast of any back.

The front discloses together with beacon 203 broadcast indicator that sends (perhaps being sent as broadcasting indication 604a, 604b respectively by each partner appliance) in Fig. 6 and has shown for (a plurality of) broadcast to have selected which broadcast resource about Fig. 3 A.In order to select these resources, according to one exemplary embodiment of the present invention, at first D2D equipment detect and can be used for the resource that broadcast transmits; And application examples transmits in order to select which (which) resource will be used to broadcasting in the middle of the available resources as the selection algorithm that is discussed in more detail below subsequently.

The quantity of the detected resource that is not used of D2D equipment depends on the quantity of the equipment in beacon group at least, and depends on the beacon resource of being used by each beacon conveyer.For example hypothesis has 50 beacon slots (its bandwidth is 1MHz) available, and 20 equipment are arranged.Therefore will there be 30 beacon slots to can be used for broadcast.

Can be for example obtain information about the beacon resource of using by using from the leading beacon measuring process in local neighborhood.An example from main procedure like this is that the D2D beacon that it is received should be monitored and report to the D2D equipment of each transmission D2D beacon.Information about received beacon receives transmission in indication frame (as IE) at the D2D beacon, and it is included in the received D2D beacon of listing in the beacon map element.For instance, the D2D beacon receives the indication frame and can transmit as IE during D2D BO, and perhaps it can be to exchange as unicast frame during the handshake phase at BO in request and response scheme.Utilize this measuring process, each equipment is known each beacon resource of using in the double bounce neighborhood.

Can select the resource that transmits for broadcast by any in the middle of following two exemplary algorithm.In the first resource selection algorithm, equipment is selected one of them beacon slot that is not used randomly.In the Secondary resource selection algorithm, equipment calculates by following steps and is used for the beacon slot that broadcast transmits: (freedom) beacon slot of a) determining not to be used (its be in 0 and subtract a certain numerical value between one than the total quantity of free beacon slot); B subsequently) beacon slot that is not used is carried out index or numbering, this is to realize by being set to the minimum beacon slot that is not used and for each remaining beacon slot that is not used, numbering being increased progressively one 0; And c) select the beacon slot that is not used [numbering of the beacon slot that for example is not used=(equipment of itself ID) delivery (total quantity of free beacon slot subtracts)] of numbering by using based on certain formula of device id or a certain other unique identifiers.

Can be for example in setting up signaling, as shown in Figure 8 broadcasting partner sets up autonomous broadcast mass measurement with the beacon partner.In this signaling, pass on the basic parameter that is used for the broadcast mass measurement with signal.During broadcast transmitted, D2D broadcasting partner preserved the record that receives about broadcast in section's memory within it, and compared with its performance and in the standard that provides during signaling of setting up that is used for the broadcasting partnership.If satisfy standard, broadcast the broadcasting indication frame that the partner transmits the performance statistic that comprises the broadcast transmission.If do not satisfy standard within longer a period of time or in broadcast transmission in succession, report afterwards this point in the maximum reporting period (interval of its definition broadcasting indication transmission) corresponding to the broadcasting partner.

Consider Fig. 8.Equipment 2 and equipment 1 and 3 exchange partners cooperation requests 801,803, and these request 801,803 basic parameters that carry for the broadcast mass measurement.Interested in Fig. 8 is the parameters that sent to equipment 1 and 3 by equipment 2, and this is because those parameters that are received from equipment 1 and/or equipment 3 with it from the parameter of equipment 2 need not be identical.Equipment 1 and 3 receives from equipment 2 the first set that comprises three broadcasts 804 respectively, and collects respectively the mass measurement of these received broadcasts 804.At this moment, the measurement quality of the message of being collected by equipment 3 satisfies standard, so equipment 3 sends broadcast status indication 805 to equipment 2.

Equipment 1 and 3 receives from equipment 2 the second set that comprises three broadcasts 806 respectively subsequently, and collects respectively the mass measurement of these received broadcasts 806.At this moment, the measurement quality of the message of only being collected by equipment 1 satisfy its with the exchange 801 of equipment 2 in the standard that receives, so equipment 1 sends broadcast status indication 807 to equipment 2.In the past after maximum reporting period 810, if the measurement quality of being collected by equipment 3 does not also satisfy standard, equipment 3 also sends broadcast status indication 808.Described maximum reporting period can be by a certain standard setting, and perhaps it can be the parameter (not shown in Fig. 9 A) of setting up during signaling.If continuation Fig. 8, the situation that may occur is corresponding to passing by the maximum reporting period of equipment 1, and it sends broadcast status indication.

The form of Fig. 9 A shows according to the exemplary embodiment of the instruction of this paper and adds in the broadcasting partnership request message 801,803 of Fig. 8 in order to set up the field of the standard that the autonomous triggering that transmits about broadcasting measures.The equipment of transmission broadcasting partnership request message 801,803 is set up the parameter for the conveyer of broadcasting partner response message, and vice versa.

Following IE corresponding to broadcasting partnership request message 801,803 has been shown in Fig. 9 A.The overtime 902IE of broadcast controls the use of measuring for autonomous broadcasting.When the numerical value of this field is set to 0, does not monitor the broadcast conflict and do not report yet.Numerical value 1-63 shows that the broadcasting partner monitors conflict, and the BO of this numerical value appointment some, and the broadcasting partner transmits broadcast status indication 805,807,808 to report that it not yet receives broadcast from described equipment after the BO of described number.The overtime field 902 of broadcast is also specified corresponding to broadcast status indication message 805,807 in succession, 808 minimum report interval.Described minimum report interval is specified the minimum period between the broadcast status indication message 805,807,808 in succession that transmits.This minimum period has been avoided in the situation that satisfy the broadcast status indication storm of reporting standards.

Failure message maximum quantity 904 is in succession arranged in addition.More than corresponding to failure in succession in this field of the maximum quantity of message during indicated numerical value, the broadcasting partner sends broadcast status indication message when the wrong broadcast that receives in succession that the broadcast from the broadcasting partner transmits.Numerical value 0 in this field 904 shows that this standard does not exist.The broadcasting partner can be from be included in the broadcast header sequence number or from the number of detected conflict determination failed message.

Failed message maximum average value 906 is arranged in addition.The broadcasting partner keeps the record corresponding to the accepting state of 64 broadcasts (perhaps a certain other predetermined fixed number) that transmit recently.When the quantity of the broadcast that receives when mistake exceeded the number of appointment in this failed message maximum average value field 906, the broadcasting partner sent broadcast status indication message 805,807,808.Numerical value 0 in this field 906 shows that this standard does not exist.

The form of Fig. 9 B shows the broadcast status indication message 805,807 according to Fig. 8 of the exemplary embodiment of the instruction of this paper, each field of 808.As previously mentioned, be met send this message if independently broadcast measurement standard.Described broadcast status indication message comprises the statistics that broadcast transmits, and is sent to the broadcasting partner appliance as unicast messages in one embodiment.Below this message 805,807,808 IE:

Message type field 910 is used to the information type of detect-message.

The bit field 912 of the BO of received broadcast message shows that described equipment receives the BO of broadcast therein.Bit value 0 shows the state of previous BO, and bit value 64 shows the state of the Radio Beacon meeting before 64 BO.Each bit is set to 1 showing that equipment has received broadcast in BO, and is set to 0 and does not receive broadcast to show.

The bit field 914 that the broadcasting sub-slots that receives receives successful field shows the success that the broadcasting sub-slots receives.Appointment is corresponding to the state of nearest 64 broadcasting sub-slots.Each bit in this field 914 is set to 1 to show the successful reception for the broadcast sub-slots, is set to 0 to show that this sub-slots is not correctly received.

Show the quantity of the BO after the broadcasting sub-slots of previous success reception from front BO field 916 after once successfully receiving.Numerical value 0 in this field 916 shows correctly receive the broadcasting sub-slots in previous BO, and the numerical value 255 in this field 916 showed before 255 or more BO and successfully receives previous broadcasting sub-slots.

The information broadcast ability can allow to find to have equipment, D2D network operation and the local advertising of D2D ability.Described message is collected in D2D beacon resource, thereby allows to transmit simultaneously a plurality of broadcasts and compare with wlan network and reduced stand-by electric consumption, as shown in Figure 10.Figure 10 is the comparison for the estimating power density (vertical axis) of the LAE that utilizes one embodiment of the present of invention and WLAN radio transmitting broadcast and minimum transmission and time of reception (trunnion axis).As seen in Figure 10, the broadcasting of LAE transmits within a short period of time and implements, and giving than short pass/power density during time of reception is usually higher.It will be reasonably similar supposing the wireless reception of WLAN and LAE and transmit power consumption, therefore participate in the wireless stand-by electric consumption of LAE of broadcasting transmission less than the WLAN radio.

According to the instruction of this paper to be used for the resource reservation that broadcast sends be extendible, and can distribute when needed more resources.Show the continuation that broadcast transmits in the broadcasting header, thereby permission equipment receives all broadcasts, and permission equipment returns to electric power saving state after having transmitted all message.

With reference to Fig. 6, suppose in this frame 600 broadcast that two broadcasting partner UE1 and UE2 as the beacon receiving equipment wish respectively to send himself, as the front is described in detail for Fig. 6.Each equipment is specified the resource 640,642 that will send therein these different broadcast 631a, 631b in broadcasting indication 604a, 604b.But in front in the restriction for the description of Fig. 6, do not exist by these two partner appliance UE1 and UE2 so as to coordinating each other these resources 640,642 mechanism.Figure 11 illustrates a kind of possible result, wherein UE1 and UE2 are the beacon transfer equipments and are chosen in its broadcast of transmission in identical resource/beacon channel, thereby lead to a conflict 1101.Figure 12 illustrates a solution for this problem, it is similar with Fig. 6 on idea, and will only describe its difference in detail.

For fear of the conflict 1101 of Figure 11, can detect and solve according to Figure 12 the conflict of selected same radio resources.Equipment can detect by the decoding device beacon and have conflict, and the equipment beacon comprises broadcast and sent bit and specified broadcast resource.In another embodiment, the equipment beacon only comprises that broadcast has sent bit, and the first and second synchronizing sequences are added in broadcast.Described synchronizing sequence is specified the physical equipment ID of the equipment that sends broadcast, for example PSS noted earlier and SSS.Even in the situation that conflict, receiver also can detect physical equipment ID and report conflict.

Each equipment can utilize the priority process to solve and avoid detected conflict.D2D equipment with higher priority is allowed in the upper broadcast that sends of broadcast channel (for example selected beacon channel).Described priority for example can be determined based on certain unique identifier (such as device id) and the current time of sharing between each equipment stamp.In one exemplary embodiment, described timestamp may be implemented as index or the numbering of Radio Beacon meeting, and this is because the numbering of BO derives from timestamp.Equipment with lower priority can select another resource that is not used to send its broadcast.The equipment that priority is lower can identify the resource that is not used based on the broadcasting partner's who observes other equipment in the UL of back frame re-transmission and the optional information about available resources from the conflict Indication message.

Figure 12 shows beacon frame 1200, wherein two beacon transmitting apparatus D1 and D2 transmit its beacon 1210-1,1210-2 in a DL cycle 1201 on its corresponding beacon channel 1240-1, the 1240-2 in the first set of radio resources 1240 according to its device id, as the front is described in detail for Fig. 1.These two equipment D1 and D2 also transmit its header 1220 in this identical DL cycle 1201, but it disturbs each other, and this is because whole two headers are all to send in the identical beacon channel that is used to broadcast 1250-1 in being in the second set of radio resources 1250.When two equipment transmitted broadcast on identical resource, described transmission will destroy each other, and the correct receipt message of the equipment that receives whole two transmission.

Fig. 3 A according to the front, receiving equipment can detect the header which equipment has sent conflict, this is because the 1210-1 of equipment beacon own, 1210-2 can identify its transmitting apparatus, and has and show that its described equipment will use which resource or " channel " 1250-1 to send the information element (supposing that broadcast has sent bit and has been set to numerical value 1 and will transmits broadcast to show it) of broadcast.Be assumed to be the beacon transmission for Figure 12 and kept the 50MHz frequency band, and single beacon signal is used 1MHz.This means that 50 beacons " channel " are available.In this example of 25 " channels " being used for broadcast, five bits in the selected broadcast resource of broadcast in Fig. 3 A can show channel indexes 0...24(altogether all the other 25 channels in the middle of 50 channels be in the first set of radio resources 1240 and be used to beacon and shake hands).

Therefore, receiving equipment knows that from received beacon specific two or more equipment D1 and D2 will send at identical resource 1250-1 broadcast (perhaps whether having equipment to send broadcast in the resource that is used to transmit beacon).Conflict has occured with backward (a plurality of) broadcasting transfer equipment D1 and D2 notice in receiving equipment.As shown in Figure 12, this is realized by conflict notification message 1230 in a UL cycle 1202 by D2D beacon receiving equipment.Conflict notification message 1230 for example comprises the bitmap of the equipment with limit priority and the resource that is not used in addition alternatively, as shown in Figure 13.In other embodiments, replace bitmap, conflict notification message 1230 can be carried conduct corresponding to the information about free resource of the index of the vector an of the Resources list, and perhaps message 1230 can directly be specified one or more free resources.

In Figure 13, the second field 1302 shows the equipment with limit priority, and is just as described in detail later such.It provides the beacon channel ID(that is used by the highest priority device in the middle of the equipment D1 that clashes and D2 is channel 1240-1 or 1240-2 in this embodiment, for example distribute for it 5 bits to be used for signaling), and the physical equipment ID(of this highest priority device for example distributes 4 bits to be used for signaling).The 3rd field 1304 provides the bitmap of the resource that is not used, and wherein 25 central each of available signaling bit are mapped to one of them channel of second set of radio resources 1250 that can be used to potentially broadcast.

In one exemplary embodiment, only have the broadcasting partner to be configured to send conflict indication 1230 by making, avoided the too much conflict Indication message that itself may destroy each other.Therefore, will be the only notified broadcasting partner's from himself of equipment D1, D2 conflict.Each in the middle of these partners for example can use different sequences to allow each message of decoding in its Indication message.In another embodiment, send the conflict indication during first time slot in the UL cycle 1202 after the conflict header 1220 of broadcasting partner in a DL cycle 1201, if and other equipment do not receive the conflict indication during the first time slot, transmit the conflict indication in second time slot in the UL cycle 1202 after can the conflict header 1220 in a DL cycle 1201.

Conflict notification 1230 is shown in Figure 12 and is used to upper transmission of (a plurality of) resource 1250-1 that broadcast transmits, and does not need beacon channel ID.The equipment that perhaps picks out conflict can be shown the D2D triggering to its transmission 1230(on related equipment D1, D2 uses in by conflict beacon resource 1210-1,1210-2 in Figure 12).In another embodiment, send to these equipment in the indication that will conflict on the beacon channel that is used by equipment D1 and D2 or on the beacon channel that keeps for the conflict indication.In the example of Figure 12, channel 1250-2 is that lower priority equipment D2 will be used for carrying out the channel that is not used that its broadcasting transmits in frame 1200.

In one exemplary embodiment, the equipment D1 that receiving conflict indication 1230 and having simultaneously a limit priority continues to send broadcast on the channel 1250-1 of initial appointment, and equipment D1 is repeated broadcast header 1260-1 in identical channel 1240-1 also, and this is because the initial header that sends 1220 with the header that is sent by lower priority equipment D2, interference has occured.Have the equipment D2 that conflicts and do not have limit priority and select another free resource 1250-2, such as selecting in the middle of the bitmap 1304 from conflict indicator message 1230.Lower priority equipment D2 retransmits its header 1260-2 on the new resources 1240-2 that its broadcast moves on to.Lower priority equipment D2 or the resource that can retransmit by the broadcast that finds the broadcasting partner who another equipment do not detected thereon determine which resource in the second set 1250 is free resource.

Figure 14 illustrates the exemplary signaling diagram that this conflict solves.UE0 is that the beacon in frame 1200 receives the broadcasting partner, and UE1 and UE5 are the beacon transmitting apparatus that also has broadcast to send in this frame, and UE3 is the beacon transmitting apparatus that will send without any broadcast in this frame.UE0 is each the broadcasting partner in the middle of UE1, UE3 and UE5.In 1402, receive the beacon from all three other equipment on the different beacon channels of receiving equipment UE0 in the first set of radio resources 1240.Not conflict between described beacon itself, and UE0 all correctly receives and decodes it.

In 1404, receiving equipment UE0 sees having between UE1 and UE5 and conflicts, and this is because the broadcasting of described two equipment indication has all shown same channel 1250-1 in the second set of radio resources for its broadcast.Header 1220 clashes, and can't decode wherein any of UE0.UE0 sends conflict indication 1230-1 and 1230-5 to UE1 and UE5; This is identical message, and it shows bitmap or other indications that UE1 has higher priority and shows the resource that is not used in the second set 1250.UE1 has higher priority, so it does not do anything except retransmitting its header 1260-1 on the initial broadcast resource 1250-1 that selects.UE5 is lower priority equipment, so its selection new resources 1250-2 from the second set 1250, and retransmits its header 1260-2 on these new resources 1250-2.

In an exemplary embodiment as shown in Figure 15, based on physical equipment ID(PHY ID) and the definite priority facility of current time stamp.The LAE system comes synchronous its operation with common timestamp, and it is used to determine the priority of equipment together with device id.In one exemplary embodiment, can be numbered each Radio Beacon, derive described numbering from timestamp simultaneously.

Two conflict equipment are arranged in the simplified characterization of Figure 15, we suppose its corresponding device id be 7 and 2(here we only use last bit digital of device id, but also can use other parts or whole ID).Integer 1-10 is arranged in Figure 15 randomly, and this random arrangement is stored in the memory of all D2D equipment (for example announcing in the D2D communication technology standard) jointly.The starting point that the current time mark is determined corresponding to priority, it is in the numerical value 7 of described random arrangement.According to the position of device id skew along described random arrangement.Device id 7 is moved right seven positions can the described random arrangements of wraparound and obtain numerical value 5.Device id 2 is obtained numerical value 3 along described random arrangement two positions that move right.Has the priority of equipment of ID7 higher than the equipment with ID2.

20 bits of the current use of common timestamp (but this is not the constraint element of the instruction of this paper) in order to simultaneous operation in the LAE system.In one exemplary embodiment, some (for example front nine bits) in the middle of these bits are used for determining priority facility together with device id or certain other unique identifier.At first a pseudo random sequence arranges all integers of from 0 to 511 randomly, the homotaxis of ten integers in this and Figure 15, and the current location in the described sequence of common timestamp definition.By for example supposing that corresponding to physical equipment ID delivery 511(physical equipment ID can have 504 numerical value, thereby will there is no ambiguity) skew determine the position of each equipment.The same with Figure 15, the integer of the position of each equipment is determined priority.Be used to determine that the timestamp of priority will can add one for each Radio Beacon in the ideal case, this means in each Radio Beacon meeting to have different priority.

Figure 16 has made Fig. 6 and has revised so that the conflict that illustrates for the broadcast of being initiated by beacon receiver D3, D4 and D5 solves.Broadcasting partner D1 and D2 will know the beacon receiver and transmit the message that it should repeat, as describing in detail about Fig. 6.Because beacon receiver D3, D4 and D5 do not transmit beacon, therefore should utilize broadcast indication 1604-3/4 and 1604-5 to pass on signal.The synchronizing sequence that broadcast indication 1604-3/4 and 1604-5 comprise to specify physical equipment ID, physical equipment ID according to Figure 15 needs carries out priority and determines, in order to make broadcasting partner D1 and D2 in beacon conveyer group know beacon receiver D3, D4 and D5 intention transmission broadcast.

Beacon receiver D3, D4 and D5 should only select one of them resource that is not used (it is not used to the broadcast of equipment beacon and beacon conveyer) to transmit to be used for its broadcast.But a plurality of beacon receivers may be selected identical resource and may clash, and in Figure 16, equipment D3 and D4 clash in its broadcasting indication 1604-3/4.Can use in this case with Figure 12 in for shown similar conflict of beacon conveyer solving process.Marked difference in this example is, as shown in Figure 17, beacon receiver D3 or D4 with lower priority will not continue to transmit its broadcast.Should be mentioned that in Figure 16, resource 1640-1 just is being used for the broadcast of himself by beacon conveyer D1.In the example of Figure 16, what clash is broadcast from beacon receiver D3 and D4, and this is because all beacon receivers can be avoided the broadcast from beacon conveyer D1.

Figure 17 shows the process chart for the process of being avoided the broadcast conflict by the beacon receiving equipment.Equipment D3 and D4 have selected identical beacon channel 1640-4 to indicate to be used for its broadcasting in a UL subframe 1602, thereby lead to a conflict.Its broadcasting partner is scanned and is sought conflict indication 1702, and sends conflict notification message 1630 in next DL subframe 1603.Conflict notification message 1630 also shows the equipment (referring to Figure 15) with higher priority.In this example, D4 has higher priority, and is allowed to continue broadcast transmission 1704 on the channel 1640-4 in its original selection after repeating its broadcasting header 1660-4.Lower priority equipment D3 stops transmitting 1706.

Should be mentioned that if broadcast is transmitted by beacon receiver D4, D5, beacon conveyer D1, the D2 that searches for free resource after conflict will also avoid resource 1640-4, the 1640-5 by beacon receiver D4, D5 reservation.

Figure 18 is similar to Figure 10, and draws out LAE and the wireless curve chart of sending successful estimation of WLAN that transmits for being used to the D2D network broadcast message.Improved for the use of collision detection and beacon broadcast device that LAE is wireless to be sent successfully.WLAN does not have the broadcasting that is confirmed and transmits, and the failed risk of transmission causes having eliminated broadcast in some topology for the first time.

Exemplary embodiment of the present invention provides a kind of collision detection and solution process, thereby allows reliable broadcast exchange.The technique effect that broadcasting reliably transmits is to allow to reduce more energetically in intelligence floods scheme to transmit number of times.When number of retransmissions is reduced, can avoid receiving the power consumption of the inessential copy of broadcast.

Another technique effect of described exemplary embodiment is, the broadcast of initiating for beacon conveyer and beacon receiver has all defined collision detection and solution process.Another technique effect is, guarantees that for the detection that success transmits the successful transmission that is confirmed will continue.

The simplified block diagram of the various electronic equipments that are applicable to put into practice exemplary embodiment of the present invention is described referring now to Figure 19.In Figure 19, wireless network 9 is adapted to in a UE110 and access node 12(base station) between and communicate between the 2nd UE211 and access node 12 in addition.Described network can comprise gateway GW/ service mobility entity MME/ radio network controller RNC14 or in different wireless communication systems by other radio controller function (not shown) known to various titles.In one embodiment, network allocation is used for the BO of D2D communication, and its can by UE be used for keeping with each other and with the simultaneous operation of the BO that is distributed.

The below will describe a UE110 in detail, but should be understood that, the 2nd UE211 has similar function and also has similar structure at an embodiment.The one UE10 comprise memory (MEM) 10B of data processor (DP) 10A, storage program (PROG) 10C and be coupled to one or more antenna 10E(show one) suitable radio frequency (RF) transceiver 10D, in order to carry out two-way wireless communication by one or more wireless links 15 with BS12.UE10 can link 16 by D2D and communicate by letter simultaneously with BS12 with another UE11.Described communication simultaneously can in the upper generation of independent resource (for example different frequency chunks), perhaps utilize other transceiver and/or antenna to use identical resource.Each link can have different or maximum transmission power even independently.The 2nd UE11 and additional UE(are not shown) as being configured similarly shown for a UE10 in Figure 19.

Term " connection ", " coupling " or its any modification mean any direct or indirect connection or the coupling between two or more elements, and can comprise the existence of one or more intermediary element between " connection " or " coupling " two elements together.Coupling between element or connection can be physics, logic or its combination.Here two elements that adopt can be considered to by using one or more electric wires, cable or printing to be electrically connected to and " connection " or " coupling " together by using electromagnetic energy, wherein as limiting examples, described electromagnetic energy is for example that its wavelength is in the electromagnetic energy in radio frequency section, microwave section and optics (visible and invisible) section.

BS12 also comprises DP12A, the MEM12B of storage PROG12C and the suitable RF transceiver 12D that is coupled to one or more antenna 12E.BS12 can be wired or wireless by data path 18() be coupled to internet, mobile switching centre or other radio networks, this can realize by service or other GW/MME/RNC14.If present, the described GW/MME/RNC suitable modulator-demodulator and/or the transceiver (not shown) that also comprise the MEM14B of DP14A, storage PROG14C and be used for communicating by letter with BS12 by data link 18.

PROG10C and 12C one of them is assumed to be and comprises program command at least, when being carried out by the DP that is associated, described program command allows electronic equipment exemplary embodiment according to the present invention to operate, just as previously described in detail.Inherent clock in DP10A and 12A in order to allow to carry out between each device synchronous, transmits and receives in reasonable time interval, BO, subframe, cycle and/or time slot thereby depend on the circumstances.

PROG10C and 12C can suitably come specific implementation with software, firmware and/or hardware.In general, exemplary embodiment of the present invention can be realized by the computer software that is stored in MEM12B and can be carried out by the DP12A of BS12, and for UE10(and other UE11 of describing in detail previously) other MEM10B and DP10A be also analogue, perhaps realize by hardware, perhaps the combination by the software in shown any or all equipment and/or firmware and hardware realizes.

In general, portable unit or the terminal of UE10, each embodiment of 11 combination that can include, but is not limited to mobile radio station, cell phone, have the PDA(Personal Digital Assistant) of wireless communication ability, the portable computer with wireless communication ability, the image capture device with for example digital camera and so on of wireless communication ability, the game station with wireless communication ability, the music storage with wireless communication ability and playback utensil, allow wireless the Internet access and the internet utensil of browsing and be associated with such function.

MEM10B and 12B can be any types that is applicable to local technical environment, and can utilize any suitable data storage technology to realize, such as memory devices, magnetic memory device and system, optical memory devices and system, read-only storage and the removable memory of based semiconductor.DP10A and 12A can be any types that is applicable to local technical environment, and can comprise one or more all-purpose computers, special-purpose computer, microprocessor, digital signal processor (DSP) and based on the processor of polycaryon processor framework as limiting examples.

Figure 20 illustrates exemplary process.In square frame 2002, D2D beacon transfer equipment transmits beacon in beacon frame, communicates at the first radio resource of selecting in the middle of the first set of radio resources of this beacon frame being used for.In square frame 2004, still in this beacon frame, the beacon transfer equipment transmits broadcast the second radio resource of selecting in the middle of the second set of radio resources of this beacon frame.

The below is the various concrete exemplary embodiment of each element in Figure 20, and it can revise Figure 20 individually or with combination in any.

The equipment beacon comprises about will transmit the indication of broadcast in beacon frame.

The equipment beacon comprises the indication of specifying the second radio resource.

Also has another element that transmits the broadcast header during the initial subframe of beacon frame in the second radio resource.In this case, the transmission of equipment beacon is to carry out during the initial subframe of beacon frame, and the broadcast header also comprises about how many subframes of having distributed beacon frame to be used for transmitting the indication of broadcast.

The broadcast header also comprises the Retransmission control field, and it shows that optionally which in the middle of a plurality of broadcasting partner appliances will retransmit broadcast.

Broadcast from each that optionally shows by the Retransmission control field another element that partner appliance receives the re-transmission of described broadcast during also having the subframe (it is immediately following after having transmitted the subframe of broadcast betwixt) at the second radio resource.

Also has another element: in response to transmitting the broadcast header, transmitted therein in a subframe of the second radio resource after the subframe of broadcast header and received the conflict indication; And indicate in response to receiving conflict, retransmit the broadcast header in the subframe subframe afterwards that receiving therein conflicts indicates.

Conflict indication comprises that the beacon transfer equipment about the processing of implementing Figure 20 is not the indication of the highest priority device in the middle of all devices indicated in the conflict indication.In this case, be to carry out in the 3rd radio resource in being confirmed as the second set of radio resources freely for the re-transmission of broadcast header.

Determine that from the information that is included in the conflict indication the 3rd radio resource is freely.

Described priority is determined by unique identity and message time stamp.

Also have with the identical OFDM symbol parallel ground that is used to broadcast with the OFDM symbol in the first radio resource and additional elements that the beacon receiving equipment exchanges.The example of such exchange comprises authentication, service discovery, association, resource negotiation and session setup.

Described beacon frame is the first beacon frame, and also has other element: with the first beacon frame periodically during isolated the second beacon frame:

Receive the broadcast from the broadcasting partner in the radio resource of the second set of radio resources of the second beacon frame; And

Receive therein a sub-image duration of subframe second beacon frame afterwards of the broadcast of broadcasting the partner, retransmit broadcasting partner's broadcast in the radio resource of the second set of radio resources.

For passing through exemplary embodiment various aspects of the present invention described in detail here, should be mentioned that, the front in Figure 17 and 20 and the description of each logic step that carries out in Fig. 2,5-6,8,12,14 and 16 signaling and sequential chart can represent program step, perhaps interconnect logic circuit, square frame and the function of integrated circuit, the perhaps combination of program step and logical circuit, square frame and function.

In general, can realize each embodiment with hardware or special circuit, software (being embodied in the computer-readable instruction on computer-readable medium), its combination in any of logic OR.For instance, some aspect can realize with hardware, and other aspects can be with can be realized by firmware or software that controller, microprocessor or other computing equipments are carried out, but the invention is not restricted to this.Although various aspects of the present invention may or be used certain other diagrammatic representations and illustrate and describe as block diagram, flow chart, but should be understood that, as limiting examples, these square frames as described herein, device, system, technology or method can with hardware, software, firmware, special circuit or logic, common hardware or controller or other computing equipments or its certain make up to realize.

Embodiments of the invention can be practiced in the various assemblies of integrated circuit modules and so on for example.The design overall of integrated circuit is supermatic processing.Complicated and powerful Software tool can be used for design with logical level and converts to and be ready to the semiconductor circuit design that etching forms on Semiconductor substrate.

The program of self routing wire and positioning component is used perfect design rule and pre-stored design module storehouse on semiconductor chip.In case after completing the design for semiconductor circuit, just can be sent to the semiconductor fabrication facility to the final design with standardized electric subformat (for example Opus, GDSII etc.) or " factory (fab) " makes.

When reading by reference to the accompanying drawings, various equivalent modifications can be expected various modifications and adaptive according to the description of front.But any and all modifications for instruction of the present invention will drop in the scope of non-limiting example of the present invention.

Although be to describe in the situation of specific embodiment, those skilled in the art will recognize that, can make many modifications and various change to the instruction of this paper.Therefore, although specifically illustrate and described the present invention about one or more embodiment, but it will be appreciated by those skilled in the art that and to make therein specific modification or change in the situation that do not deviate from the scope of the present invention set forth as the front or the scope of appended claims.

Claims (40)

1. method, it comprises:

In beacon frame:

Transmit the first radio resource of selecting in the middle of the first set of radio resources of described beacon frame and be used for equipment to the beacon of devices communicating; And

Transmit broadcast the second radio resource of selecting in the middle of the second set of radio resources of described beacon frame.

2. according to claim 1 method, wherein, equipment is included in the communication from the first portable set to the second portable set in the situation that does not relate to network node to devices communicating.

3. according to claim 1 method, wherein, equipment comprises the communication from the first equipment to one group of other equipment in the node interconnection network to devices communicating, wherein the node interconnection network comprises self-organizing network.

4. according to claim 1 method, wherein, equipment comprises by flooding mechanism via the communication of node interconnection network from the first equipment to the second equipment devices communicating.

5. according to claim 1 method, wherein, beacon comprises about will transmit the indication of broadcast in beacon frame.

6. according to claim 5 method, wherein, beacon also comprises the indication of specifying the second radio resource.

7. the method for any one in 6 according to claim 1, it also comprises:

Transmit the broadcast header in the second radio resource during the initial subframe of beacon frame;

And wherein the broadcast header also comprises about how many subframes of having distributed beacon frame to be used for transmitting the indication of broadcast.

8. according to claim 7 method, wherein, the broadcast header also comprises the Retransmission control field, it shows that optionally which in the middle of a plurality of broadcasting partner appliances will retransmit broadcast.

9. according to claim 8 method, it also comprises:

During having transmitted therein the subframe of the second radio resource after the subframe of broadcast, receive the re-transmission of broadcast from each the broadcasting partner appliance that optionally shows by the Retransmission control field.

10. according to claim 7 method, it also comprises:

In response to transmitting the broadcast header, receive the conflict indication from another equipment in the second radio resource; And in response to receiving the conflict indication, retransmit the broadcast header.

11. method according to claim 10, wherein, conflict indication comprises about the equipment of carrying out described method being not the indication of the highest priority device in the middle of a plurality of equipment that show in the conflict indication,

And be wherein to carry out in the 3rd radio resource in being confirmed as the second set of radio resources freely for the re-transmission of broadcast header.

12. method according to claim 11 wherein, determines that from the information that is included in the conflict indication the 3rd radio resource is freely.

13. method according to claim 11 wherein, is determined priority by one of them of unique identifier and the following: the message time stamp; The timestamp of deriving from sharing sequential; And the shared numbering of beacon frame or chance.

14. the method for any one in 6 according to claim 1, it also comprises:

Come to exchange with the beacon receiving equipment with the OFDM symbol in the first radio resource with the identical OFDM symbol parallel ground that is used to broadcast, described exchange comprises at least one in authentication, service discovery, association, resource negotiation and session setup.

15. method according to claim 1, wherein, beacon frame is the first beacon frame, and described method also comprises:

With the first beacon frame periodically during isolated the second beacon frame:

Receive broadcasting partner's broadcast in the radio resource of the second set of radio resources of the second beacon frame; And

During receiving therein the subframe of the second beacon frame after broadcasting partner's the subframe of broadcast, retransmit broadcasting partner's broadcast in the radio resource of the second set of radio resources.

16. a device, it comprises:

At least one processor; And

At least one memory of storage computer-readable instruction program;

Wherein, described at least one memory and instruction repertorie are configured to utilize described at least one processor to make described device implement at least following steps:

Transmit the first radio resource of selecting in the middle of the first set of radio resources of beacon frame and be used for equipment to the beacon of devices communicating; And

Transmit broadcast the second radio resource of selecting in the middle of the second set of radio resources of described beacon frame.

17. device according to claim 16, wherein, beacon comprises about will transmit the indication of broadcast in beacon frame.

18. device according to claim 17, wherein, beacon also comprises the indication of specifying the second radio resource.

19. the device of any one in 18 according to claim 16, wherein, described at least one memory and instruction repertorie are configured to utilize described at least one processor to make described device also implement following steps:

Transmit the broadcast header in the second radio resource during the initial subframe of beacon frame;

And wherein the broadcast header also comprises about how many subframes of having distributed beacon frame to be used for transmitting the indication of broadcast.

20. device according to claim 19, wherein, the broadcast header also comprises the Retransmission control field, and it shows that optionally which in the middle of a plurality of broadcasting partner appliances will retransmit broadcast.

21. device according to claim 20, wherein, described at least one memory and instruction repertorie are configured to utilize described at least one processor to make described device also implement following steps:

During having transmitted betwixt the subframe of the second radio resource after the subframe of broadcast, receive the re-transmission of broadcast from each the broadcasting partner appliance that optionally shows by the Retransmission control field.

22. device according to claim 19, wherein, described at least one memory and instruction repertorie are configured to utilize described at least one processor to make described device also implement following steps:

In response to transmitting the broadcast header, receive the conflict indication from another equipment in the second radio resource; And in response to receiving the conflict indication, retransmit the broadcast header.

23. device according to claim 22, wherein, conflict indication comprises about described device being not the indication of the highest priority device in the middle of a plurality of equipment that show in the conflict indication,

And be wherein to carry out in the 3rd radio resource in being confirmed as the second set of radio resources freely for the re-transmission of broadcast header.

24. device according to claim 23 wherein, determines that from the information that is included in the conflict indication the 3rd radio resource is freely.

25. device according to claim 23 wherein, is determined priority by one of them of a unique identifier and the following: the message time stamp; The timestamp of deriving from sharing sequential; And the shared numbering of beacon frame or chance.

26. the device of any one in 18 according to claim 16, wherein, described at least one memory and instruction repertorie are configured to utilize described at least one processor to make described device also implement following steps:

Come to exchange with the beacon receiving equipment with the OFDM symbol in the first radio resource with the identical OFDM symbol parallel ground that is used to broadcast, described exchange comprises at least one in authentication, service discovery, association, resource negotiation and session setup.

27. device according to claim 26, wherein, beacon frame is the first beacon frame, and wherein said at least one memory and instruction repertorie are configured to utilize described at least one processor to make described device also implement following steps:

With the first beacon frame periodically during isolated the second beacon frame:

Receive broadcasting partner's broadcast in the radio resource of the second set of radio resources of the second beacon frame; And

During receiving therein the subframe of the second beacon frame after broadcasting partner's the subframe of broadcast, retransmit broadcasting partner's broadcast in the radio resource of the second set of radio resources.

28. a memory of storing the computer-readable instruction program, when being carried out by at least one processor, described instruction causes following action:

Transmit the first radio resource of selecting in the middle of the first set of radio resources of beacon frame and be used for equipment to the beacon of devices communicating; And

Transmit broadcast the second radio resource of selecting in the middle of the second set of radio resources of described beacon frame.

29. memory according to claim 28, wherein, beacon comprises about will transmit the indication of broadcast in beacon frame.

30. memory according to claim 29, wherein, beacon also comprises the indication of specifying the second radio resource.

31. the memory of any one in 30 according to claim 28, described action also comprises:

Transmit the broadcast header in the second radio resource during the initial subframe of beacon frame;

And wherein the broadcast header also comprises about how many subframes of having distributed beacon frame to be used for transmitting the indication of broadcast.

32. memory according to claim 31, wherein, the broadcast header also comprises the Retransmission control field, and it shows that optionally which in the middle of a plurality of broadcasting partner appliances will retransmit broadcast.

33. memory according to claim 32, described action also comprises:

During having transmitted betwixt the subframe of the second radio resource after the subframe of broadcast, receive the re-transmission of broadcast from each the broadcasting partner appliance that optionally shows by the Retransmission control field.

34. memory according to claim 31, described action also comprises:

In response to transmitting the broadcast header, receive the conflict indication from another equipment in the second radio resource; And in response to receiving the conflict indication, retransmit the broadcast header.

35. memory according to claim 34, wherein, conflict indication comprises about the device that comprises described memory and at least one processor being not the indication of the highest priority device in the middle of a plurality of equipment that show in the conflict indication,

And be wherein to carry out in the 3rd radio resource in being confirmed as the second set of radio resources freely for the re-transmission of broadcast header.

36. memory according to claim 35 wherein, determines that from the information that is included in the conflict indication the 3rd radio resource is freely.

37. memory according to claim 35 wherein, is determined priority by one of them of a unique identifier and the following: the message time stamp; The timestamp of deriving from sharing sequential; And the shared numbering of beacon frame or chance.

38. the memory of any one in 30 according to claim 28, described action also comprises:

Come to exchange with the beacon receiving equipment with the OFDM symbol in the first radio resource with the identical OFDM symbol parallel ground that is used to broadcast, described exchange comprises at least one in authentication, service discovery, association, resource negotiation and session setup.

39. memory according to claim 28, wherein, beacon frame is the first beacon frame, and described action also comprises:

With the first beacon frame periodically during isolated the second beacon frame:

Receive broadcasting partner's broadcast in the radio resource of the second set of radio resources of the second beacon frame; And

During receiving therein the subframe of the second beacon frame after broadcasting partner's the subframe of broadcast, retransmit broadcasting partner's broadcast in the radio resource of the second set of radio resources.

40. a device, it comprises:

Be used for transmitting at the first radio resource of selecting in the middle of the first set of radio resources of beacon frame and be used for equipment to the parts of the beacon of devices communicating; And

Be used for transmitting at the second radio resource of selecting the parts of broadcast in the middle of the second set of radio resources of described beacon frame.

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